Abstract: Based on the canopy temperature and micrometeorological data of Quercus variabilis in its main growth season (from May to August) in hilly areas of North China in 2011, this paper analyzed the variations of canopy temperature (T_c) in Q. variabilis plantation and their relations with micrometeorological factors in typically clear days and cloudy days. From 9:00 to 17:00 in  clear days, the boundary layer of canopy was unstable, and the mean T_c was 3.55 ℃ higher than the mean air temperature (T_a). In  cloudy days, the variations of T_c were gentler than those in  clear days. The T_c was significantly correlated with T_a, net solar radiation (R_n), relative humidity, and wind speed, with a multiple correlation coefficient being 0.825. The T_a and R_n were the dominant meteorological factors controlling T_c, and their affecting degree on T_c was associated with weather condition.